Engineering Materials
Grey cast iron has

Carbon in the form of free graphite
All of these
High tensile strength
Low compressive strength

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Engineering Materials
Tungsten in steel

Improves cutting ability and reduces hardenability
Improves wear resistance, cutting ability and toughness
Gives ductility, toughness, tensile strength and anti-corrosion properties
Refines grain size and produces less tendency to carburisation, improves corrosion and heat resistant properties

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